diff options
Diffstat (limited to 'drivers/net/wireless/mwifiex/pcie.c')
| -rw-r--r-- | drivers/net/wireless/mwifiex/pcie.c | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/drivers/net/wireless/mwifiex/pcie.c b/drivers/net/wireless/mwifiex/pcie.c index ac20bc4bc1a..19b5a83f4e7 100644 --- a/drivers/net/wireless/mwifiex/pcie.c +++ b/drivers/net/wireless/mwifiex/pcie.c @@ -764,6 +764,37 @@ static int mwifiex_pcie_delete_sleep_cookie_buf(struct mwifiex_adapter *adapter) return 0; } +/* This function flushes the TX buffer descriptor ring + * This function defined as handler is also called while cleaning TXRX + * during disconnect/ bss stop. + */ +static int mwifiex_clean_pcie_ring_buf(struct mwifiex_adapter *adapter) +{ + struct pcie_service_card *card = adapter->card; + u32 rdptr; + + /* Read the TX ring read pointer set by firmware */ + if (mwifiex_read_reg(adapter, REG_TXBD_RDPTR, &rdptr)) { + dev_err(adapter->dev, + "Flush TXBD: failed to read REG_TXBD_RDPTR\n"); + return -1; + } + + if (!mwifiex_pcie_txbd_empty(card, rdptr)) { + card->txbd_flush = 1; + /* write pointer already set at last send + * send dnld-rdy intr again, wait for completion. + */ + if (mwifiex_write_reg(adapter, PCIE_CPU_INT_EVENT, + CPU_INTR_DNLD_RDY)) { + dev_err(adapter->dev, + "failed to assert dnld-rdy interrupt.\n"); + return -1; + } + } + return 0; +} + /* * This function sends data buffer to device */ @@ -1995,6 +2026,7 @@ static struct mwifiex_if_ops pcie_ops = { .update_mp_end_port = NULL, .cleanup_mpa_buf = NULL, .init_fw_port = mwifiex_pcie_init_fw_port, + .clean_pcie_ring = mwifiex_clean_pcie_ring_buf, }; /* |